Signal Processing Toolbox

Generating an M-File

You can generate an M-file that contains all the code used to create the filter you designed in FDATool. Select Generate M-file from the File menu and specify the filename in the Generate M-file dialog box.

The following is a sample generated M-file of the default FDATool filter.

• function Hd = untitled
  %UNTITLED Returns a discrete-time filter object
  
  %
  % M-file generated by MATLAB(R) 6.5 and the Signal Processing
  % Toolbox 6.0.
  %
  % Generated on: 24-Oct-2002 09:46:59
  %
  
  % Remez FIR Lowpass filter designed using the firpm function.
  
  % All frequency values are in Hz.
  Fs = 48000;  % Sampling Frequency
  
  Fpass = 9600;            % Passband Frequency
  Fstop = 12000;           % Stopband Frequency
  Dpass = 0.057501127785;  % Passband Ripple
  Dstop = 0.0001;          % Stopband Attenuation
  dens  = 16;              % Density Factor
  
  % Calculate the order from the parameters using firpmord.
  [N, Fo, Ao, W] = firpmord([Fpass, Fstop]/(Fs/2), [1 0], ...
  [Dpass, Dstop]);
  
  % Calculate the coefficients using the firpm function.
  b  = firpm(N, Fo, Ao, W, {dens});
  Hd = dfilt.dffir(b);
  
  % [EOF]
  

Generating a C Header File

Managing Filters in the Current Session

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